Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Marketable Securities Classified as Available-for-Sale

Marketable securities classified as available-for-sale consisted of the following (in thousands):

	December 31, 2016
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value
Corporate bonds	$	522	$	—	$	—	$	522
Total	$	522	$	—	$	—	$	522

	December 31, 2015
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Corporate bonds	$	25,608	$	122	$	(73	)	$	25,657
Asset-backed securities	12,424		—		(31		)	12,393
Mortgage-backed securities	4,800		2		(23		)	4,779
Government and agency securities	5,705		16		(9		)	5,712
Municipal bonds	2,470		—		(2		)	2,468
Total	$	51,007	$	140	$	(138	)	$	51,009

Amortized Cost and Fair Value of Marketable Securities Classified by Stated Maturity

The following table summarizes the amortized cost and fair value of our marketable securities, classified by maturity as of December 31, 2016 and 2015 (in thousands):

	December 31, 2016				December 31, 2015
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Marketable securities
Due in 1 year or less	$	522	$	522	$	17,783	$	17,870
Due in 1-4 years	—		—		26,258		26,200
Due in 5-9 years	—		—		2,844		2,843
Due in more than 9 years	—		—		4,122		4,096
	$	522	$	522	$	51,007	$	51,009